Results 71 to 80 of about 254,154 (222)

Ice Age: Chemodynamical Modeling of Cha-MMS1 to Predict New Solid-phase Species for Detection with JWST

The Astrophysical Journal, 2022
Chemical models and experiments indicate that interstellar dust grains and their ice mantles play an important role in the production of complex organic molecules (COMs).
Miwha Jin, Ka Ho Lam, Melissa K. McClure, Jeroen Terwisscha van Scheltinga, Zhi-Yun Li, Adwin Boogert, Eric Herbst, Shane W. Davis, Robin T. Garrod   +8 more
doaj   +1 more source

Candidate quantum spin ice in the pyrochlore Pr$_2$Hf$_2$O$_7$ [PDF]

, 2016
We report the low temperature magnetic properties of the pyrochlore Pr$_2$Hf$_2$O$_7$. Polycrystalline and single-crystal samples are investigated using time-of-flight neutron spectroscopy and macroscopic measurements, respectively.
Balakrishnan, Geetha, Fennell, Tom, Fåk, Björn, Gauthier, Nicolas, Hatnean, Monica Ciomaga, Kenzelmann, Michel, Lhotel, Elsa, Sibille, Romain   +7 more
core   +4 more sources

Identification of Imitation Cheese and Imitation Ice Cream Based on Vegetable Fat Using NMR Spectroscopy and Chemometrics

International Journal of Food Science, 2013
Vegetable oils and fats may be used as cheap substitutes for milk fat to manufacture imitation cheese or imitation ice cream. In this study, 400 MHz nuclear magnetic resonance (NMR) spectroscopy of the fat fraction of the products was used in the context
Yulia B. Monakhova, Rolf Godelmann, Claudia Andlauer, Thomas Kuballa, Dirk W. Lachenmeier   +4 more
doaj   +1 more source

Static Ice Pressure Measuring System Based on Fiber Loop Ring-Down Spectroscopy and FPGA

Sensors, 2020
Hydraulic engineering built in the cold region, such as reservoirs and hydropower stations, is often threatened by static ice pressure from nature.
Xiao Deng, Dingrui Wang, Lipeng Pan, Li Zhang, Jun Zhang, Xinshuo Lu, Chao Du, Lin Zhang   +7 more
doaj   +1 more source

Laboratory Research [PDF]

To properly interpret the rapidly growing body of data from comet observations, many types of laboratory measurements are needed. These include: (1) molecular spectroscopy in the visible, ultraviolet, infrared and microwave region of the spectra; (2 ...
Donn, B.
core   +1 more source

Formation of Hydrogen, Oxygen, and Hydrogen Peroxide in Electron Irradiated Crystalline Water Ice

, 2005
Water ice is abundant both astrophysically, for example in molecular clouds, and in planetary systems. The Kuiper belt objects, many satellites of the outer solar system, the nuclei of comets and some planetary rings are all known to be water-rich ...
Averna D., Cooper B. H., David Jewitt, Flower D. R., Gerakines P. A., Gerakines P. A., Hendrix A. R., Hovington P., Pirronello V., Ralf I. Kaiser, Tielens A. G. G. M., Weijun Zheng   +11 more
core   +1 more source

Theoretical Spectra of Terrestrial Exoplanet Surfaces [PDF]

, 2012
We investigate spectra of airless rocky exoplanets with a theoretical framework that self-consistently treats reflection and thermal emission. We find that a silicate surface on an exoplanet is spectroscopically detectable via prominent Si-O features in ...
Batalha, Best, Bethany L. Ehlmann, Borucki, Borucki, Cheek, Clark, Clark, Cochran, Cowan, de Pater, Drilling, Farmer, Gautier, Koch, Miller-Ricci, Muirhead, Pieters, Pieters, RELAB Spectral Database, Renyu Hu, Rogers, Salisbury, Sara Seager, Seager, Seager, Sobolev, Sprague, Winn   +28 more
core   +2 more sources

Activity-induced Near-infrared Spectral Variability at 29P/Schwassmann–Wachmann 1, 2017–2022

The Planetary Science Journal
29P/Schwassmann–Wachmann 1 (SW1) is both the first-discovered active Centaur and the most outburst-prone comet known. The nature of SW1’s many outbursts, which regularly brighten the comet by 5 mag or more, and what processes power them has been of ...
Theodore Kareta, Charles A. Schambeau, Megan Firgard, Yanga R. Fernández   +3 more
doaj   +1 more source

Methane, ammonia, and their irradiation products at the surface of an intermediate-size KBO? A portrait of Plutino (90482) Orcus

, 2010
Orcus is an intermediate-size 1000km-scale Kuiper Belt Object in 3:2 mean-motion resonance with Neptune, in an orbit very similar to that of Pluto. We present visible and near-infrared photometry and spectroscopy obtained with the Keck 10m-telescope and ...
A. Delsanti, A. Guilbert-Lepoutre, B. Yang, Baratta, Barkume, Barucci, Barucci, Bauer, Brown, Brown, Brown, Brown, Brown, Brucker, Brunetto, Buie, Canup, Castillo-Rogez, Cook, Cooper, Dalle Ore, de Bergh, Delsanti, Delsanti, Desch, Duffard, Durham, F. Merlin, Fornasier, Fornasier, Gomes, Grundy, Guilbert, Hapke, J. Bauer, Jewitt, Jewitt, K. J. Meech, Kargel, Kargel, Khare, Klinger, Lewis, Malhotra, Malhotra, Merlin, Merlin, Merlin, Moore, Moore, Oke, Perets, Pinilla-Alonso, Pinilla-Alonso, Pinilla-Alonso, Quirico, Rabinowitz, Rabinowitz, Rabinowitz, Schaller, Schaller, Schmitt, Sheppard, Sicardy, Snodgrass, Stevenson, Strazzulla, Trujillo, Wong, Zheng, Zubko   +70 more
core   +2 more sources

Photolysis and Sublimation Chemistry of Ammonium Cyanide with Relevance to Cometary Environments

The Planetary Science Journal
Bulk nitrogen is depleted in solar system objects, including the terrestrial planets, chondritic meteorites, and comets. Recently, it was suggested that cometary nitrogen may be locked up in ammonium salts—ionic solids comprising ammonia (NH _3 ) and an ...
O. H. Wilkins, K. M. Yocum, V. J. Esposito, E. Harel, S. N. Milam, P. A. Gerakines   +5 more
doaj   +1 more source